I've been trying to put my music on my Nokia Lumia 521. At first, I plugged the phone into my Surface via the USB cable provided and used File Explorer to copy my music to the microSD card I had in the phone. I had no trouble with this and was satisfied, until the next day when I found duplicates of all the songs on my phone. What was peculiar was that there weren't the same number of duplicates; one song would have 20 duplicates and another only 2. I plugged the phone back in and neither the phone or microSD card had duplicates of any songs. I have about 600 songs, but according to the phone and the Windows Phone app installed on my Surface, I have around 4000. I read some threads, and following their advice, made sure the Xbox Music cloud feature on my phone wasn't turned on, but it helped nothing. I figured I would just try to copy everything again, so I deleted all the music from the microSD card via File Explorer, but again, on my phone and the Windows Phone app, there were still 4000ish songs with duplicates. I checked both the microSD and the phone's storage, and neither had any music at all. How can I transfer all my music to the phone without these ridiculous duplicates?